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Where did viruses come from and how did they evolve? Are viruses alive? (7m 29s)
What Was the Ancestor of Everything?
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The search for our origins go back to a single common ancestor. (11m 6s)
The Other Explosion You Should Know About
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The Sudden burst of diversity that marked the dawn of truly complex life on our planet. (6m 25s)
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Follow the early history of how (and why) sex became a thing. (5m 39s)
How Two Microbes Changed History
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More than two billion years ago, a tiny living thing started to live inside another thing. (7m 39s)
The Search for the Earliest Life
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Even in a hellish environment, life found a way. (5m 37s)
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But imagine a time when the Earth looked a little … purple. (5m 37s)
That Time Oxygen Almost Killed Everything
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What if we told you that there was a time when oxygen almost wiped out all life on Earth? (4m 45s)
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